Updated ruby to 2.2.5 for travis
Updated ruby to 2.2.5 for travis

st0012/searchkick,klebervirgilio/searchkick,savayg/searchkick,instacart/searchkick,savayg/searchkick,meetrajesh/searchkick,instacart/searchkick,elguapo1611/searchkick,spanner/searchkick,jprosevear/searchkick,mikelkew/searchkick,mikelkew/searchkick,Xtinct/searchkick,Xtinct/searchkick,meetrajesh/searchkick,spanner/searchkick,ankane/searchkick,jprosevear/searchkick,johan--/searchkick,elguapo1611/searchkick,st0012/searchkick,klebervirgilio/searchkick,johan--/searchkick